US9068543B2 - Fuel injection system with integrated high-pressure accumulator - Google Patents

Fuel injection system with integrated high-pressure accumulator Download PDF

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Publication number
US9068543B2
US9068543B2 US13/520,287 US201013520287A US9068543B2 US 9068543 B2 US9068543 B2 US 9068543B2 US 201013520287 A US201013520287 A US 201013520287A US 9068543 B2 US9068543 B2 US 9068543B2
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US
United States
Prior art keywords
pressure
accumulator
distribution element
cylinder head
injection system
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related, expires
Application number
US13/520,287
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English (en)
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US20120279473A1 (en
Inventor
Sylvain Besancon
Friedrich Boecking
Sakae Sato
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Assigned to ROBERT BOSCH GMBH reassignment ROBERT BOSCH GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: SATO, SAKAE, BESANCON, SYLVAIN, BOECKING, FRIEDRICH
Publication of US20120279473A1 publication Critical patent/US20120279473A1/en
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Expired - Fee Related legal-status Critical Current
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/02—Fuel-injection apparatus having several injectors fed by a common pumping element, or having several pumping elements feeding a common injector; Fuel-injection apparatus having provisions for cutting-out pumps, pumping elements, or injectors; Fuel-injection apparatus having provisions for variably interconnecting pumping elements and injectors alternatively
    • F02M63/0225—Fuel-injection apparatus having a common rail feeding several injectors ; Means for varying pressure in common rails; Pumps feeding common rails
    • F02M63/0265—Pumps feeding common rails
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/02—Conduits between injection pumps and injectors, e.g. conduits between pump and common-rail or conduits between common-rail and injectors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/022—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type having an accumulator storing pressurised fuel during pumping stroke of the piston for subsequent delivery to the injector
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/40—Fuel-injection apparatus with fuel accumulators, e.g. a fuel injector having an integrated fuel accumulator

Definitions

  • the invention relates to a fuel injection system of an internal combustion engine having a high-pressure pump, wherein a high-pressure outlet of the high-pressure pump is connected to a high-pressure accumulator, which comprises at least one accumulator outlet for connecting to a fuel injector.
  • Such a fuel injection system is disclosed by DE 10 2005 027 851 A1.
  • This fuel injection system having a high-pressure pump comprises two pump pistons, which are driven by a camshaft and which serve, each via a non-return valve, to deliver the fuel into a high-pressure accumulator arranged and fitted separately from the high-pressure pump.
  • the fuel is drawn from the high-pressure accumulator for injection into combustion chambers of the internal combustion engine by means of fuel injectors, which are connected via lines to the high-pressure accumulator.
  • the object of the invention is to provide a fuel injection system, which is of compact and securely fitted construction.
  • the high-pressure accumulator is directly adapted to the high-pressure pump and that the accumulator outlet is aligned in a precisely defined position relative to the high-pressure pump.
  • the adaptation of the high-pressure accumulator to the high-pressure pump affords the advantage that said accumulator does not have to be fitted as a separate component and suitably connected to the high-pressure pump.
  • the precise alignment of the accumulator outlet affords the advantage that the connecting line to the fuel injector is precisely defined and no adjustment of the line is necessary in order to make the fitting more secure.
  • the high-pressure pump comprises a pump housing having a cylinder head, and the high-pressure outlet of the high-pressure pump opens into a cylinder head wall.
  • the opening of the high-pressure outlet into a cylinder head wall allows the compact attachment of the high-pressure accumulator directly to the cylinder head wall, for example, so that preferably two cylinder units of the internal combustion engine can be served by one high-pressure accumulator (although in principle it is also possible to supply one, three or four cylinder units).
  • the high-pressure accumulator is embodied as a distribution element interacting with the high-pressure outlet.
  • this distribution element is preferably fitted to a wall of the cylinder head of the high-pressure pump and—as previously stated—preferably serves two cylinder units of the internal combustion engine.
  • Such a distribution element having a cylindrical, cupped design is especially suitable, since it can be readily manufactured and the cupped interior offers a sufficiently large accumulator capacity for the high-pressure accumulator.
  • the distribution element may also be of cylindrical tube-shaped design, at least the one accumulator outlet then being sited laterally on the cylindrical tube-shaped distribution element.
  • the distribution element comprises one, two, three or four accumulator outlets.
  • the accumulator outlets are preferably arranged at an angle other than an angle of 0° to its cylinder longitudinal axis. This arrangement firstly allows the adaptation of more than one accumulator outlet to the distribution element, but on the other hand necessitates precise alignment of the distribution element, in order to be able to connect at least the one connecting line to the fuel injector with adjustment operations.
  • the distribution element is fastened to the cylinder head wall by means of a holder.
  • a holder In principle it would be possible to screw the distribution element, provided with a thread, for example, directly to the cylinder head wall. Then, however, the alignment of the accumulator outlets would be ensured only through a precisely defined screwed attachment position.
  • the use of a holder allows the distribution element to be aligned precisely in relation to the cylinder head, for example through a corresponding marking (or an alignment device explained below), and then fastened to the cylinder head wall by means of the holder.
  • the holder is a clamping screw, which, for example, is screwed together with a threaded connector on the cylinder head.
  • the clamping screw comprises a supporting flange, which rests on an annular flange of the distribution element.
  • the clamping screw may also be embodied as a double-acting screw having a right-hand thread and a left-hand thread and may interact with corresponding threads on the cylinder head and the distribution element.
  • the distribution element comprises an alignment device interacting with the high-pressure outlet or the cylinder head, for example a device in the form of at least one lug, which interacts with a corresponding recess. The necessary alignment is thereby then achieved directly and precisely without further optical alignment.
  • the distribution element opposite the connection side to the high-pressure outlet or the cylinder head, comprises a connection aperture for a closing cover or a rail pressure sensor.
  • This embodiment can be used to particular advantage when the distribution element is of cylindrical tube-shaped design.
  • FIG. 1 shows a sectional representation of a distribution element of cupped design
  • FIG. 2 shows a detail view of an alignment device of the distribution element taken through section line II-II of FIG. 1 ,
  • FIG. 3 shows an alternative embodiment of the fastening of the distribution element on the cylinder head
  • FIG. 4 shows a sectional representation of an alternative distribution element of cylindrical tube-shaped design
  • FIG. 5 shows a cross-sectional representation through the distribution element of cylindrical tube-shaped design taken through section line V-V of to FIG. 4 .
  • the high-pressure pump of a fuel injection system of an internal combustion engine comprises a pump housing having a cylinder head 1 , wherein a partially represented pump piston 2 is guided in a cylinder bore of the cylinder head 1 and delivers the fuel from a delivery chamber 3 via a high-pressure outlet 4 , into which a pressurizing valve 5 is connected, into a high-pressure accumulator 23 .
  • the high-pressure outlet 4 opens into a cylinder head wall 6 of the cylinder head 1 of the high-pressure pump.
  • Formed on to the cylinder head wall 6 is an annular threaded connector 7 , into which a distribution element 8 of cupped design is inserted, the interior of which forms the high-pressure accumulator 23 .
  • the high-pressure pump may be fitted into a cylinder head of the internal combustion engine and then does not have a drive shaft of its own but is driven by a shaft of the internal combustion engine, for example the camshaft thereof.
  • the high-pressure pump may also have a driveshaft of its own, which is driven by the internal combustion engine.
  • the cupped distribution element 8 comprises an annular flange 9 , on which a corresponding supporting flange 10 of a clamping screw 11 grips.
  • the clamping screw 11 is screwed together with the threaded connector 7 and presses the distribution element 8 on to the cylinder head wall 6 of the cylinder head 1 of the high-pressure pump.
  • the cupped distribution element 8 has a sealing geometry 12 on the side facing the cylinder head wall 6 . Alternatively a seal is inserted between the corresponding components.
  • the distribution element 8 On the opposite side of the distribution element 8 , two accumulator outlets 13 a , 13 b , for example, on which lines can screwed for connecting to fuel injectors, are let into the base wall.
  • the number of accumulator outlets 13 (for example two, three or four) depends on the number of cylinders of the internal combustion engine, since a fuel injector is assigned to each cylinder unit.
  • the distribution element comprises yet another connection 14 , to which a rail pressure sensor 15 can be connected.
  • the rail pressure sensor serves to register the fuel pressure in the high-pressure accumulator 23 for controlling the fuel refill quantity.
  • FIG. 2 shows the cupped distribution element 8 , which is provided with alignment devices 16 in the form of three circumferentially distributed lugs. These lugs engage in corresponding recesses in the threaded connector 7 (or vice-versa) and ensure a precise alignment of the distribution element 8 relative to the cylinder head wall 6 .
  • the number of lugs preferably corresponds to the number of accumulator outlets 13 , in order to ensure a precise assignment and alignment. For example, two accumulator outlets 13 are arranged opposite one another (180°), as are the lugs, whereas three accumulator outlets as well as the lugs are arranged rotationally staggered by 120°, and four accumulator outlets by 90° in relation to one another.
  • the threaded connector 7 a is directly integrated into the cylinder head 1 , and the clamping screw 11 a is designed as a double acting screw having a right-hand thread and a left-hand thread. Accordingly the distribution element 8 a here also has an external thread 17 , so that when screwing the clamping screw 11 a the distribution element 8 a is screwed together with the threaded connector 7 a .
  • the further design of the distribution element 8 a is very similar to FIG. 1 .
  • the distribution element 8 b is of cylindrical tube-shaped design and is screwed together with a connector 18 , which interacts with cylinder head wall 6 , by means of a clamping screw 11 b .
  • the connector 18 corresponds to the threaded connectors 7 , 7 a .
  • the clamping screw 11 b is supported on a clamping ring 19 , which is inserted into a circumferential groove of the connector 18 , and at the same time is screwed into an internal thread of the distribution element 8 b .
  • An alignment device (not shown) and a sealing geometry are provided between the connector 18 and the distribution element 8 b.
  • a closing cover 21 is screwed into a connection aperture 20 of the distribution element 8 b .
  • the rail pressure sensor may also be screwed in here.
  • the closing cover 21 screwed into the connection aperture 20 has a recess 22 , which causes the fuel pressure acting inside the recess 22 to exert a radial pressure on the screwed connection. Any expansion of the distribution element 8 b is thereby compensated for, thus enhancing the efficiency of the seal.
  • FIG. 5 in a cross-sectional representation shows the distribution element 8 b with two accumulator outlets 13 a , 13 b , for example, and a further connection 14 for the rail pressure sensor.
  • the number of actual accumulator outlets 13 (for example two, three or four) depends on the number of cylinders of the internal combustion engine, since a fuel injector is assigned to each cylinder unit.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
US13/520,287 2010-01-27 2010-12-29 Fuel injection system with integrated high-pressure accumulator Expired - Fee Related US9068543B2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE102010001252 2010-01-27
DE102010001252.1 2010-01-27
DE102010001252A DE102010001252A1 (de) 2010-01-27 2010-01-27 Kraftstoffeinspritzsystem mit integriertem Hochdruckspeicher an einem Zylinderkopf
PCT/EP2010/070871 WO2011091937A1 (de) 2010-01-27 2010-12-29 Kraftstoffeinspritzsystem mit integriertem hochdruckspeicher

Publications (2)

Publication Number Publication Date
US20120279473A1 US20120279473A1 (en) 2012-11-08
US9068543B2 true US9068543B2 (en) 2015-06-30

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
US13/520,287 Expired - Fee Related US9068543B2 (en) 2010-01-27 2010-12-29 Fuel injection system with integrated high-pressure accumulator

Country Status (8)

Country Link
US (1) US9068543B2 (ja)
EP (1) EP2529104B1 (ja)
JP (1) JP5491643B2 (ja)
KR (1) KR101835894B1 (ja)
CN (1) CN102770659B (ja)
DE (1) DE102010001252A1 (ja)
RU (1) RU2568024C2 (ja)
WO (1) WO2011091937A1 (ja)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10041435B2 (en) * 2014-12-16 2018-08-07 Fca Us Llc Direct injection fuel system with controlled accumulator energy storage and delivery
US9593653B2 (en) * 2015-01-21 2017-03-14 Ford Global Technologies, Llc Direct injection fuel pump system

Citations (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4943618A (ja) 1972-05-24 1974-04-24
US3841797A (en) * 1971-11-18 1974-10-15 W Fitzgerald Power units
JPS50114519A (ja) 1974-02-25 1975-09-08
US3918857A (en) * 1972-11-10 1975-11-11 William Maurice Bar Fitzgerald Hydraulic motors with intermeshing sun and planet gears
US3918851A (en) * 1972-11-10 1975-11-11 William Maurice Bar Fitzgerald High velocity shaft seal
US4048970A (en) * 1972-11-10 1977-09-20 Fitzgerald William Maurice Bar Fuel injector
JPS5417696A (en) 1977-07-08 1979-02-09 Maekawa Seisakusho Kk Moving article position indicator in sealed container
US4275693A (en) * 1977-12-21 1981-06-30 Leckie William H Fuel injection timing and control apparatus
US5143029A (en) * 1990-09-24 1992-09-01 Christenson Howard W Two cycle internal combustion hydrocycle engine
JPH07167009A (ja) 1993-12-14 1995-07-04 Yamaha Motor Co Ltd エンジンへの燃料供給装置
US5438968A (en) * 1993-10-06 1995-08-08 Bkm, Inc. Two-cycle utility internal combustion engine
EP0881380A1 (de) 1997-05-30 1998-12-02 SIG Schweizerische Industrie-Gesellschaft Hochdruckförderpumpe
US6016790A (en) * 1996-07-05 2000-01-25 Nippon Soken, Inc. High-pressure pump for use in fuel injection system for diesel engine
JP2000110692A (ja) 1998-09-30 2000-04-18 Sig (Schweiz Ind Ges) 共通レ―ル噴射装置
US6330876B1 (en) 1999-11-19 2001-12-18 Crt Common Rail Technologies Ag High-pressure injection system with common rail
JP2002521616A (ja) 1998-07-29 2002-07-16 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング 内燃機関用の燃料供給装置
US6637408B2 (en) * 1999-02-17 2003-10-28 Stanadyne Corporation Common rail fuel supply system with high pressure accumulator
US20060102150A1 (en) * 2002-05-23 2006-05-18 Kurt Frank High-pressure accumulator for fuel injection systems with integrated pressure control valve
WO2006134002A1 (de) 2005-06-16 2006-12-21 Robert Bosch Gmbh Kraftstoffeinspritzsystem für eine brennkraftmaschine
US20070227478A1 (en) * 2006-04-03 2007-10-04 John William Fitzgerald Electro-hydraulic valve actuator with integral electric motor driven rotary control valve
US20070277785A1 (en) 2003-10-23 2007-12-06 Stefan Portner Radial Piston Pump For Common Rail Injection Systems
US20080213115A1 (en) * 2005-08-04 2008-09-04 Ulrich Hilger High-Pressure Gas Compressor And Method Of Operating A High-Pressure Gas Compressor
US20090199820A1 (en) * 2006-05-04 2009-08-13 Robert Bosch Gmbh Pressure control valve with limp-home and ventilation function

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DE1903305B2 (de) * 1969-01-23 1977-09-15 Vickers Gmbh, 6380 Bad Homburg Mengenregler in form eines dreiwegeventils
JPS4943618U (ja) * 1972-07-25 1974-04-17
JPS5417696Y2 (ja) * 1974-02-28 1979-07-06
SU1746036A1 (ru) * 1989-09-05 1992-07-07 Московский Автомобильно-Дорожный Институт Топливна система многоцилиндрового дизел
EP0889233A3 (en) * 1993-05-06 2000-02-02 Cummins Engine Company, Inc. Compact high performance fuel system with accumulator
DE19647049A1 (de) * 1996-11-14 1998-05-20 Bosch Gmbh Robert Kraftstoffeinspritzsystem
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3841797A (en) * 1971-11-18 1974-10-15 W Fitzgerald Power units
JPS4943618A (ja) 1972-05-24 1974-04-24
US3918857A (en) * 1972-11-10 1975-11-11 William Maurice Bar Fitzgerald Hydraulic motors with intermeshing sun and planet gears
US3918851A (en) * 1972-11-10 1975-11-11 William Maurice Bar Fitzgerald High velocity shaft seal
US4048970A (en) * 1972-11-10 1977-09-20 Fitzgerald William Maurice Bar Fuel injector
JPS50114519A (ja) 1974-02-25 1975-09-08
JPS5417696A (en) 1977-07-08 1979-02-09 Maekawa Seisakusho Kk Moving article position indicator in sealed container
US4275693A (en) * 1977-12-21 1981-06-30 Leckie William H Fuel injection timing and control apparatus
US5143029A (en) * 1990-09-24 1992-09-01 Christenson Howard W Two cycle internal combustion hydrocycle engine
US5438968A (en) * 1993-10-06 1995-08-08 Bkm, Inc. Two-cycle utility internal combustion engine
JPH07167009A (ja) 1993-12-14 1995-07-04 Yamaha Motor Co Ltd エンジンへの燃料供給装置
US6016790A (en) * 1996-07-05 2000-01-25 Nippon Soken, Inc. High-pressure pump for use in fuel injection system for diesel engine
JPH10331760A (ja) 1997-05-30 1998-12-15 Sig (Schweiz Ind Ges) 高圧供給ポンプ
EP0881380A1 (de) 1997-05-30 1998-12-02 SIG Schweizerische Industrie-Gesellschaft Hochdruckförderpumpe
JP2002521616A (ja) 1998-07-29 2002-07-16 ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング 内燃機関用の燃料供給装置
JP2000110692A (ja) 1998-09-30 2000-04-18 Sig (Schweiz Ind Ges) 共通レ―ル噴射装置
US6637408B2 (en) * 1999-02-17 2003-10-28 Stanadyne Corporation Common rail fuel supply system with high pressure accumulator
US6330876B1 (en) 1999-11-19 2001-12-18 Crt Common Rail Technologies Ag High-pressure injection system with common rail
US20060102150A1 (en) * 2002-05-23 2006-05-18 Kurt Frank High-pressure accumulator for fuel injection systems with integrated pressure control valve
US20070277785A1 (en) 2003-10-23 2007-12-06 Stefan Portner Radial Piston Pump For Common Rail Injection Systems
WO2006134002A1 (de) 2005-06-16 2006-12-21 Robert Bosch Gmbh Kraftstoffeinspritzsystem für eine brennkraftmaschine
US20080213115A1 (en) * 2005-08-04 2008-09-04 Ulrich Hilger High-Pressure Gas Compressor And Method Of Operating A High-Pressure Gas Compressor
US20070227478A1 (en) * 2006-04-03 2007-10-04 John William Fitzgerald Electro-hydraulic valve actuator with integral electric motor driven rotary control valve
US20090199820A1 (en) * 2006-05-04 2009-08-13 Robert Bosch Gmbh Pressure control valve with limp-home and ventilation function

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PCT/EP2010/070871 International Search Report dated Apr. 15, 2011 (Translation and Original, 4 pages).

Also Published As

Publication number Publication date
RU2012136542A (ru) 2014-03-10
CN102770659A (zh) 2012-11-07
JP5491643B2 (ja) 2014-05-14
EP2529104A1 (de) 2012-12-05
KR20120112655A (ko) 2012-10-11
WO2011091937A1 (de) 2011-08-04
RU2568024C2 (ru) 2015-11-10
EP2529104B1 (de) 2014-08-06
US20120279473A1 (en) 2012-11-08
KR101835894B1 (ko) 2018-03-07
DE102010001252A1 (de) 2011-07-28
JP2013518209A (ja) 2013-05-20
CN102770659B (zh) 2015-05-20

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